Welcome to HVAC-Talk.com, a non-DIY site and the ultimate Source for HVAC Information & Knowledge Sharing for the industry professional! Here you can join over 150,000 HVAC Professionals & enthusiasts from around the world discussing all things related to HVAC/R. You are currently viewing as a NON-REGISTERED guest which gives you limited access to view discussions

To gain full access to our forums you must register; for a free account. As a registered Guest you will be able to:

Participate in over 40 different forums and search/browse from nearly 3 million posts.

I couple of years ago, we had an variable spped, 2-stage American Standard Freedom 90 Comfort-R, model # AUY100R9V4W2 furnace installed into our 1904 Four square home. At that time, the installer installed a standard Honeywell T8424 non-programmable thermostat. Since that time, we have been wishing we had purchased a programable thermostat, so that we could set it to turn up or down at night or have it set at different temperatures for different days of the week.I presently have the opportunity to purchase a Honeywell T8624D thermostat, which is advertised as a
"7 Day Programmable Chronotherm® IV Plus Thermostat with automatic/manual changeover, 2 Heat/2 Cool stages and R,C,B,W1,W2,Y1,Y2,G,O,RC,OT,OT terminals for conventional multistage systems."

Will this thermostat work with the system we have? If so is it a good thermostat or are there other thermostats out there that you would recommend over this one? Thanks in advance for your replys, SD1111